Welcome Antonij! Send my greetings to Prof. Kodzabasija and Protopsalt Goce Sekuloski!
The first file has the troparia from the beginning of Great Saturday Matins "Noble Joseph" etc. The stasis hymns are chanted with the verses of psalm 118 being recited before them, a practice virtually defunct in Greek parish usage (Karas tried to revive it) but still popular in Slavic churches.
Indeed Dimitri is right about the ison, yet it is a good effort overall.
The churches in that part of the Balkans did have a good psaltic tradition both in Greek (in congregations faithful to the Patriarchate) and Church Slavonic (in congragations that had joined the Bulgarian exarchate). When these lands became part of Serbia after the Balkan wars the Serbs imposed by force the use of their folk style church music (pojanje) and this is the music which still is widely used.
From the early 2000's onwards there has been a revival of monasticism and psaltic music though there is still a lot to be done...